Igniter for gas burners



Ema 24, 135, I O. J) LEINS 2,@25,351

IGNITER FOR GAS BURNERS Original Filed April 30, 1950 Patented Dec. 24,1935 UNITED STATES PATENT OFFICE IGNITER FOR GAS BURNERS ApplicationApril 30, 1930, Serial No. 448,603 Renewed April 29, 1935 4 Claims.

My invention relates to igniters for gas burners and contemplates animprovement to guard against the escape of unburned gas from the burnerin the event that the flame is quenched by liquid boiling over the sidesof a vessel placed over the burner.

It is well known that, in the use of gas ranges, the burner flame issometimes quenched by liquid boiling over the sides of a vessel on therange,

entailing the escape of large quantities of gas where the range is, forthe time being, unattended.

My invention provides means for automatically re-igniting the gasissuing from the burner in cases where the flame is extinguished in thatway.

My invention is illustrated in the accompanying drawing in which- Figure1 is a plan view of an arrangement em- 0 bodying my invention, and

Figure 2 is a partial sectional view taken on the line 2-2 of Figure 1,looking in the direction indicated by the arrows.

The usual gas manifold is illustrated at 3. The

gas burner is illustrated at 4, this burner being fed from the manifold3 by the usual feed pipe 5, to which air is admitted, in the usual way,at the end nearest the manifold. Gaseous fuel is led into the feed pipe5 by way of the nozzle pipe 6,

from the manifold 3, in which nozzle pipe the usual gas cock 1 isprovided. v

An igniter is provided in appropriate proximity to the burner 4. Thisigniter comprises a tube 8 leading from the manifold 3 and terminatingin a torch head 9 an appropriate distance from the burner 4. Althoughonly one burner is shown, it is, of course, understood that gas rangesembody a number of burners, usually four, and the torch head 9 isdisposed centrally within these circularly arranged burners. Aprotecting hood I0 is mounted over the torch head 9 upon a flangedperforated collar l2 supported on the upcurved end of the tube 8, asshown in Figure 2, below the torch head. The hood II] has the openings lI near the top and four openings l3, l3

in the circular side wall, each in line with the respective burner onthe range. A tube 14 leads from each opening l3 toward the respectiveburner, as illustrated, each of these tubes having the longitudinal slotl4 at the bottom thereof to provide for the entry of air. The torch head9 has four pilot flame openings l6 directed radially in line with thecenters of the openings I3, respectively.

At the end of the tube 8 near the manifold 3 the valve I5 is provided.This valve is of the type well known, which has a constant by-pass andwhich, when the button I5 is depressed, effects the flow of a greatlyincreased quantity of gas. By this arrangement a pilot light is main- 5tained at the four ports [6 by the gas by-passed through the valve l5,and when the burner is to be ignited, its gas cock 'I being opened, thebutton I5 is depressed to admit the flow of the greatly increasedquantity of gas, as has been pointed 1o out. This causes the pilotflames at IE to be proected radially outwardly, through the tubes l4,far enough to ignite the particular burner to which gas has beenadmitted.

Extending from the burner 4 toward the re- 15 spective adjacent tube I4is a small tube l6 which carries at its end the torch head I! extendingupwardly into the respective tube !4, as illustrated. This torch headhas the port [8 drilled in the'side thereof and so positioned as to be20 directed toward the burner 4. When the pilot light at I6 is projectedradially by the depression of the button [5, after the opening of thegas cock 1, the gas issuing from the port I8 is ignited, and it remainsignited so long as the gas cock 1 25 is open.

In the event that liquid, boiling over the sides of a vessel disposedover the burner, falls upon the burner, and quenches the flame thereon,it does so just to the extent that the liquid fills 30 the burneropenings 4. Just to the extent that burner openings 4 are closed thepressure within the burner is increased. This increase in pressurecauses the projection of the flame from port l8, over the burner, asindicated in Figure 2, 35 and as soon as the filled burner openingsbecome cleared by the evaporation of the liquid therein, the gas issuingtherefrom is ignited by this temporarily projected flame. As suchreignition takes place, the gas pressure within the burner 40 isobviously gradually restored and, accordingly, the flame at l8 graduallyrecedes to its normal length. Obviously, except for this automaticreignition, the gas which would issue from the cleared burner openings4' would be unignited, entailing the danger hereinabove referred to. Itwill also be noted that torch head I1 is protected by tube I4 againstquenching.

The above description sets forth an example 50 of an embodiment of myinvention and it is understood, of course, that changes andmodifications might be made without departing from the spirit and scopethereof. I also desire to point out that I have successfully used the 55arrangement of my invention with gases now in common use of from 500 B.t. u. to 5000 B. t. u.

I claim:

1. In combination, a gas burner, a torch head placed in proximity tosaid burner and having a port directed toward said burner, said torchhead being operatively connected to said burner to receive gas underpressure therefrom affected by the pressure within said burner so thatincrease of pressure within said burner will increase the pressurewithin said torch head in order to project a flame at said port oversaid burner, and flash ignition means operable to simultaneously andindependently initially ignite said torch head, and said burner.

2. In combination, a gas burner having burner openings, a torch headplaced in proximity to said burner and having a port directed towardsaid burner, said torch head being operatively connected to said burnerto receive gas underpressure therefrom affected by the pressure withinthe burner for maintaining a pilot flame which is insuflicient to reachthe burner when the burner openings are open and is projccted to theburner when the greater portion of the burner openings are filled byliquid boiling over and upon the burner, flash ignition means operableto simultaneously and independently ignite said burner and said torchhead, and a tube positioned to direct the flame from said flash igniterin igniting relationship to said torch head and said burner.

3. In combination, a gas burner having burner openings, a torch headplaced in proximity to said burner and having a port directed towardsaid burner, said torch head being operatively connected with saidburner to receive gas under pressure therefrom affected by the pressurewithin the burner for maintaining a pilot flame which is insufiicient toreach the burner when the burner openings are open and is projected tothe burner when the greater portion of the burner openings are filled byliquid boiling over and upon the burner, a flash pilot lighter remotefrom the burner, a hood for said pilot lighter and a protecting tubeextending from said hood to a point adjacent said burner, said tubeenclosing the ported portion of said torch head, said pilot lighterfunctioning to project a lighting flame through said tube to ignite thetorch head and to directly ignite the burner independently of said torchhead.

4. In combination, a gas burner having a plurality of gas openingstherein, a torch head placed in proximity to said burner and havingmeans connected to the interior of said burner to conduct gas underpressure from said burner tosaid torch head, said torch head having agas port directed toward said burner, and a comnoon means forsimultaneously and independently igniting gas issuing from the burneropening and from said torch head port, said torch head serving to ignitesaid burner only when said gas openings of said burner are substantiallyclosed subsequent to the ignition of gas issuing from said torch headport.

OSCAR J. LEINS.

